ROVIBRATIONALLY RESOLVED, FOURIER-TRANSFORM NEAR-INFRARED SPECTROSCOPY OF THE NU(1) AND NU(2) VIBRATIONS OF THE HCL DIMER IN A SUPERSONIC JET
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abstract
We have recorded the high-resolution (0.007 cm-1) Fourier-transform near infrared absorption spectrum of the symmetric 35Cl-35Cl, and the mixed 35Cl-37Cl isotopomers of the hydrogen chloride dimer in a supersonic jet. The spectrum was recorded under a low effective rotational temperature (20 K). Rovibrational analysis of the observed spectra has been performed for the K a=0 subbands of the v1+ and v 1- perpendicular-type bands centered at 2890 and 2879 cm-1, respectively. The Ka=0 and 1 parallel-type subbands of the v2- at 2839 cm-1 and v 2+ at 2857 cm-1 have also been analyzed. Furthermore, we have observed and investigated the (H 35Cl) 2v1+, Ka=1, K=-1 rovibrational transition centered near 2869 cm-1. The results are compared with spectra previously recorded using difference frequency tunable laser spectrometers both in a supersonic slit jet and in an equilibrium gas phase mixture to demonstrate the advantages and limitations of the FTIR technique. 1994 American Institute of Physics.
